Needle-vibrating mechanism for sewing-machines.



No. 762,544. PATENTED JUNE 14, 1904. R. L. LYONS.

NEEDLE VIBRATING MECHANISM FOR SEWING MACHINES.

APPLIQATION FILED MAY 12, 1903.

N0 MODEL. 2 SHEETS-SHEET 1.

\X/{IE i. rr sses rlzvir ur" PATENTED JUNE 14, 1904.

R. L. LYONS. NEEDLE VIBRATING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED MAY 12. 1903.

2 SHEETS-SHEET 2 N0 MODEL.

I w. E E. 4? (a? UNITED STATES Patented June 14, 1904.

PATENT OFFICE.

ROBERT L. LYONS, OF VVALTHAM, MASSACHUSETTS, ASSIGNOR TO UNION BUTTONSEW'ING MACHINE COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OFMASSACHUSETTS.

NEEDLE-VIBRATING MECHANISM FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 762,544, dated June 14,1904.

Application filed May 12, 1903.

T0 (Ll/Z whom it may concern:

Be it known that I, ROBERT L. LYoNs, of Waltham, in the county ofMiddlesex and State of Massachusetts, have invented certain new anduseful Improvements in Needle-Vibrating Mechanism for Sewing-Machines,of which the following is a specification, reference being had thereinto the accompanying drawings.

This invention has reference to improvements in sewing-machines,relating more particularly to improvements in the means for controllingthe operation of the needle-bar.

The object of the invention is to so construct a sewing-machine providedwith a needle-bar mounted in swinging bearings and means for swingingthe bearings that such means may be disconnected from its actuator at apredetermined point in the operation of the machine.

Another object of the invention is to improve the general constructionof sewing-machines with relation to needle-bar-vibrating mechanism andthe controlling means therefor.

The invention consists in the peculiar construction of the controllingmeans and in its combination with the needle-bar-operating shaft.

The invention also consists in such other novel features of constructionand combination of parts as shall hereinafter be more fully described,and pointed out in the claim.

Figure 1 represents a side elevation of a sewing-machine, partiallybroken away and illustrating this invention. Fig. 2 represents a planView of parts of the same, partially broken away. Fig. 3 represents across-sectional view taken on line 3 3, Fig. 2.

Similar numbers of reference designate corresponding parts throughout.

It is often desirable, as in button-sewing machines, that the needle-barshould be so mounted'and actuated that the point of operation of theneedle on the work can be varied without changing the position of thework This has been accomplished by mounting the needle-bar in bearingsmounted for lateral movement with respect to the path in which SerialNo.156,799. (No model.)

the needle works and in supplying means connected with some movable partof the machine 5 whereby the bearings may be moved back and forth atsuitable times. As in machines of this character the needle is shiftedto a different point of action on the material after each stitch, thesingle operation of the needle at the last of a group of stitches leavesthe thread in a condition from which it may readily be loosened underordinary conditions.

In carrying this invention into practice it has been my desire to soconstruct a sewingmachine having a needle-bar movable with relation tothe point at which the needle operates on the material and means formoving the needle-bar or its bearings that at a predete1= mined point inthe operation the lateral movement of the needle-bar ceases, while thesewing movement continues, thus causing the needle to carry its threadseveral times through the same perforation in the material andeffecting, in conjunction with the well-known operation of the shuttleunder these conditions, a knotting or securing of the threads.

As shown in the drawings, 5 represents a sewing-machine head or frame ofthe usual construction and having extensions 6 6, to which is pivotedthe frame 7, having the bearings 8 8 and the projection 9. In thebearings 8 8 is movably mounted the needle-bar 10, adapted to carryanyusual form of needle, and on the needle-bar is secured the stud 11 by30 means of its strap 12, which embraces the needle-bar, and theset-screw 13.

Journaled in bearings in the frame 5 is the needle-bar-operating shaft14 of any usual construction and adapted to be operated in 5 any usualmanner. Secured at the forward end of this shaft is the plate 15, havingthe pivot 16, the connecting-rod 17 being pivoted on this pivot 16 andon the stud 11 of the needlebar to effect a rapid reciprocation of thenee- 9 dle-bar under the rotation of the shaft 14:.

On the shaft 14 is secured the cam-block 18 of the usual constructionand formation for this purpose, and working in the groove of this cam isthe follower 19, adapted to 9 work through a suitable opening in theframe 5 when actuated by the cam or actuator 18 under the rotation ofthe shaft 1 1. On this follower is mounted the curved guide 20, in whichthe plate 21 may be adjustably positioned and secured by means of thethumbnut 22, working on thestem extending from said plate. Also securedto such stem by this clamping-nut is the operating rod or means 23,connected at its forward end with the projeetion 9 of the frame 7 by auniversal joint. If now the shaft 1 1 be rotated, the needlebar will bereciprocated through its connection therewith, while the frame 7 will beswung back and forth by the action of the groove of the cam 18 on thefollower 19 transmitted to the frame 7 by the operatingrod 23.

To effect the purpose of this invention, I provide the frame 5 with thelaterally-extending bearing 24, in which is mounted for rotative andlengthwise movement the shaft 25, one end of which is secured to theupper portion of the guide 20, while the other end portion of this shaftis provided with the collar 26, secured thereto by a set-screw, andbetween this collar and the end of the bearing 24 is theexpansion-spring 27, which by its action on the collar 26 tends to drawthe shaft 25 and the guide 20 in the direction to maintain theengagement of the follower 19 with the groove of the cam 18.

At the back of the frame 5 is the lip 28, Fig. 2, and to this lip ispivoted the lever 29, having the forked end 30, engaging the shaft andbearing against the collar 26 and the rear end 31.

On the rear end portion of the shaft 141 is mounted the worm 32, whichmay have the thumb-nut 33, if desired, and at this portion of the frame5 is mounted the bracket 34:, in which is secured the spindle 35,carrying the rotatable cam-plate 36, having the cam 37 and the gear38,meshing with the worm 32, whereby the rotation of the shaft 1 1causes the rotation of the gear 38 and the cam-plate 36 to at timescarry the cam 37 beneath the end 31 of the lever 29.

The Worm 32 and the gear 38 are so proportioned that at the completionof a group of the desired number of stitches or at any other desiredpoint in the operation of the machine the cam-plate 36 has been rotatedsufficiently to bring the cam 37 beneath the end 31 of the lever 29,thus forcing this end outward and moving the end of this lever 29 towardthe bearing 24 and at the same time moving the shaft 25 against theaction of the spring 27 to carry outward the guide 20, and to therebydisengage the follower 19 from the groove of the cam 18, the continuedoperation of the shaft 14 then resulting in driving theneedle throughthe same hole in the work and effecting a knotting or series of loopswith the shuttle-thread until the cam-plate 36 has been sufficientlyrotated to carry the cam 37 from beneath the end 31 of the lever 30.

I have herein shown and described my invention in its preferred form;but I do not desire to limit myself to this particular construction, asI am well aware that equivalents for the samemay be used to accomplishthe same results.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- In a sewingmachine and in combination with aneedle-bar vibrator comprising the shaft 14, the cam 18 on said shaft,the follower 19 working. in said cam, and the plate 20 mounted on saidfollower; the shaft 25 secured to the plate 20, the bearing 24 in whichsaid shaft is mounted, the collar 26 on said shaft, the spring 27between the collar and the bearing, the lever 29 pivotally mounted onthe frame and bearing against the collar, the worm 32 on the shaft 14:,the spindle 35 suitably mounted, and the cam-plate 36 journaled on thespindle 35 and having the plate 36 with its cam 37, adapted to actuatethe lever 29, and, the gear 38 engaged with the worm 32, substantiallyas and for the purpose described.

In testimony whereof I affix my signature in presence of two witnesses.

ROBERT L. LYONS. Witnesses:

0. WV. I-IoDeDoN, H. J. MILLER.

